For YouTubers & Creators

YouTuber Toolkit

Everything a creator needs — captions, transcription, voiceover, image tools. Free, in-browser, no sign-up.

GistAI App
📱 Android App
GistAI — YouTube on Android
Get YouTube captions & AI summaries on your phone. Tap any video — understand the gist in seconds.
Download on Google Play
10 Free Browser Tools
🎵
YouTube MP3 / MP4 Download
Paste a YouTube link → download audio as MP3 or video as MP4 (360p–720p). Free.
MP3 / MP4 Free No sign-up
🎬
YouTube Captions & Thumbnail Download
Paste a YouTube link → download SRT/TXT captions and the video thumbnail.
SRT · TXT Thumbnail Free
🎙️
Audio Transcription (STT)
Upload MP3/WAV/M4A → Whisper AI transcribes it to text, right in your browser.
Whisper AI MP3 · WAV · M4A
🔊
AI Voiceover (TTS)
Type your script → hear it read aloud. Great for Shorts narration or voiceovers.
Works offline Free
🎧
Audio → SRT (Groq Whisper)
Upload MP3/WAV/M4A → Groq Whisper generates aligned SRT subtitles with timestamps. Free API key.
SRT Groq Whisper Free
🌐
Subtitle Translator
Paste or upload SRT / VTT → translate to 100+ languages, download the result.
Free No sign-up
🔄
SRT Time Shifter
Subtitles out of sync? Paste SRT, enter offset in seconds → download fixed file.
SRT Works offline
🔗
Timestamp Link Generator
Paste a video URL + timestamp → get a link that jumps straight to that second.
YouTube Free
🖼️
Image Converter
Convert WebP, JPG or PNG to JPG or PNG in-browser — batch, no watermark, no upload.
WebP · JPG · PNG Works offline
FAQ
Are these tools really free?
Yes. Every tool is permanently free — no sign-up, no ads, no hidden fees.
Are my files uploaded to a server?
No. Everything runs directly in your browser — your files and data never leave your device.
Do I need to create an account?
No account needed. Open a tool and start using it right away.

常見使用場景

發布 YouTube 影片比過去複雜:需要章節標記、翻譯字幕、精修音訊、可搜尋的轉錄、優化的封面。每一項都是小摩擦,加起來就是每支影片的額外幾小時。

這個工具集是一組小而聚焦的瀏覽器工具,每個解決一個摩擦點——無需註冊、無浮水印、無升級到付費版的誘導。用到哪個就用哪個,用完關掉,下一個影片再來。

使用技巧

典型工作流:影片剪完,用時間戳生成器提取章節,貼到描述。上傳非英文影片?用字幕下載器抓自動字幕,用字幕翻譯器轉成目標語言,作為獨立字幕軌上傳——立刻國際化。

每個工具都在瀏覽器裡跑——不需要安裝,不需要登入,不需要授權,Windows/Mac/ChromeOS/Linux/平板都能用,租借或共用的機器也能用。收藏站點就等於收藏了所有工具。

常見問題

這些工具真的都免費嗎?

每個工具都完全免費,無註冊,輸出無浮水印,無人為限制。

你們會儲存我的影片或檔案嗎?

大部分工具全部在瀏覽器本機處理。少數(Groq Whisper、翻譯)會把內容發送給第三方 API 處理但不留存。具體見每個工具頁面。

有手機 APP 嗎?

有——GistAI Android APP 是裝置端 AI 摘要工具,支援影片、文章和 PDF。這裡列出的是網頁工具,獨立於 APP。

可以申請新工具嗎?

可以——發郵件到 [email protected]。這裡造的工具通常是解決實際工作流裡反覆出現的摩擦點。

為什麼沒有廣告?

這是一個獨立開發者的業餘專案。如果工具幫到你,歡迎但不強制留個咖啡(Buy me a coffee)。

相關免費工具

Built in the quiet hours, between everything else. Bookmark it for next time — and if it helped — Buy me a coffee
If it saved you time — Buy me a coffee